DRIVE SYSTEM QUESTIONS

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DRIVE SYSTEM QUESTIONS

Post by DeltaBossOne on November 13th 2013, 22:20

PLEASE POST ALL QUESTIONS UNDER THIS TOPIC

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AW95 Drive Chain

Post by DeltaBossOne on November 13th 2013, 22:20

THIS QUESTION WAS ORIGINALLY POSTED BY MEMBER "PILLCREEK"

Hi Drew Case, (and everybody)
been looking at your super photos, I assume as you have flown your AW95
that any changes you made worked OK, be very interested in any of your drawing changes.

I was looking at your photo 59/70 and where the screwdriver is,
would it be possible to use a chain tensioner called a ROLL-RING ( WWW.ROLL-RING.com)
instead of what is used now, see Drawing Frame 26/37 and get rid off F1,G1, and associate bolts,
be very interested in your or anybodies view, noticed by accident on internet.
I spent most of my working life as a electrician, so my mechanical engineering may be wanting.

So with that in mind you will have to excuse my next question,
when the main shaft is rotating, what keeps it attached to the helicopter,
its not evident to me from the drawings.

thanks all John Foley, UK.

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AW95 Drive Chain Reply #1

Post by DeltaBossOne on November 13th 2013, 22:22

Good Question,
I reviewed the videos at roll-ring and it looks like an awesome concept for chains that rotate around a horizontal axis, but since the main rotor drive sprocket is rotating around a vertical axis, the roll ring would simply fall out of the chain given the load requirement and other related factors. Since the chain is in that configuration, it needs to be considerably tight with preferably +/- .500" of "radial" play maximum. I'm working on a standard design for the idler sprocket to include in the plans and assembly instructions.

Your second question is fairly easy. The upper and lower main rotor shaft bearing each come with a lock collar to install on the bottom side of each bearing flange. Let me know if you need those part numbers for the bearings. That will be covered in the plan assembly instructions for Section III as well.

I hope this has been helpful,
DBO

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Re: DRIVE SYSTEM QUESTIONS

Post by pillcreek on November 14th 2013, 06:47

Thanks for quick reply, any info welcome, part numbers please.
when will section 111 be ready, seems like it would pay me to wait for
them.
Wont be doing much until next March, too cold in my garage.
Did you manufacture the drive pulley yourself drg 3/11, if not where did you get it. thanks John Foley.

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